e38 740i / 750i

hi dear fixed community! have the sufu already searched, but did not find what I had hoped for I come right to the point: does the 12-wheel motor compare i-what advantages to the 8 cylinder 4.4 l. engine, except more consumption and maintenance costs (negative) and almost 1 liter of space, plus quieter run (positive)?? should it be called (almost) no matter which motor you drive, do both not give much, or should you prefer the one to the other? to the info: the car should only be on the autobahn and then be moved there long and fast. best greetings Skuddy